Utente:For You Border

Border

Il Border è colui o colei che indirizza una persona o un gruppo di persone da una situazione propria di deiderio, ad una di consapevole accadimento, dell'affrontare logicamente le situazioni che affrontiamo di continuo ...

Significati

border-sostantivo confine frontiera bordo margine orlo estremità filetto limite border-aggettivo di confine border-verbo delimitare circoscrivere marginare fiancheggiare listare contornare cingere confinare con essere vicino a...

Natural borders

A photograph of the France–Italy border at night. The southwestern end of the Alps separates the two countries.

Natural borders are geographical features that present natural obstacles to communication and transport. Existing political borders are often a formalization of these historical, natural obstacles.

Some geographical features that often constitute natural borders are:

• Oceans: oceans create very costly natural borders. Very few nation states span more than one continent. Only very large and resource-rich states are able to sustain the costs of governance across oceans for longer periods of time.
• Rivers: some political borders have been formalized along natural borders formed by rivers. Some examples are; the Niagara River border (Canada–USA), the Rio Grande border (Mexico–USA), the Rhine border (France–Germany), and the Mekong border (Thailand–Laos). The exact location of the border is often determined by the Thalweg principle, that is the deepest line along the river.
• Lakes: larger lakes create natural borders. One example is the natural border created by Lake Tanganyika (DR Congo–Burundi–Tanzania–Zambia)
• Forests: denser jungles or forests can create strong natural borders. One example of a natural forest border is the Amazon rainforest (Colombia–Venezuela–Guyana–Brazil–Bolivia–Peru)
• Mountain ranges: research on borders suggests that mountains have especially strong effects as natural borders. Many nations in Europe and Asia have had their political borders defined along mountain ranges. The exact location is often along the drainage divide.

Throughout history, technological advances have reduced the costs of transport and communication across these natural borders. This has reduced the significance of natural borders over time. As a result, political borders that have been formalized more recently — such as those in Africa or Americas — typically conform less to natural bordersTemplate:Citation need than very old borders — such as those in Europe or Asia — do. States whose borders conform to natural borders are, for similar reasons, more likely to be strong nation states.